Storage battery



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hppltcatton riled November specification and set forth in the appendedclaim.

' In the accompanying sheet of drawings, Fig. 1 is a vertical sectionalview through a cell of a battery embodying my invention in one ofitsforms; Fig. 2 is a similar ,view

showing a modification; and Fig 3 is a top til) plan view of thebatterycell on a reduced scale.

Iteterring to the drawings, 10 represents a storage battery containerwhich may be a jar or a multi-compartment container of any of thewell-known forms. The container is adapted to receive the usual positiveand negative plates 11, having positive and negative terminal posts 12projecting up through the cell cover 13, which is generally formed ofhardrubber. The posts may be sealed in the cover in any suitable way,but in this instance they aretightly fitted in soft rubber bushings 14:,which in turn are fitted into annular flanges 15 on the under side ofthe cover 13'.

To prevent corrosion of the terminals, the terminal posts are packedwith grease where they project through the cover, and in thisapplication I have shown two forms of the invention by which this resultis accomplished in a very effective manner. In Fig. 1 the cover isprovided around each terminal post 12 with a boss 16, which is providedwith a depression 17 forming an annular groove wh' ch entirely surroundsthe terminal post and is filled with grease. This may be provided foreach of the two terminal posts of each cell of the battery, regardlessof the number of cells of which it may be composed, but the greasepacking need not be employed for those posts of a multi-cell batterywhich are connected by cross connectors extending-from cell to. cell,and which are usually lead-bu 'ned to the posts. In the li'iet'ial "lio. ldlhhdll.

latter case only the two end or terminal posts to which conductors areadapted to be attached, generally by clamps, need be provided with thegrease packing. 'lhe grease- .tilled depression or groove 1? is closedby a cover 18, cons sting preferably of a dish or washer ct hard rubber,which is fitted tightly onto the terminal post, and seats upon the topof boss 16. shrunk onto the post by being heated, and then slipped intoplace onto the top oil the boss 16 so that when it cools, it remainstightly in place.

In Fig. Q a slight modification is shown. In this instance each terminalpost is surrounded by a washer 18, hollowed out on the under side toform an annular cavity 17 which is filled with grease, but the boss,here designated 16", of the cover is not recessed. As in the firstinstance, the washer or cover 18 is preferably formed of hard rubber,and is preferably shrunk in place on the post. As shown in Fig. 2, thewasher 18 has a flange-like periphery which fits down around the coverboss 16.

It may be desirable to increase the grease space, in which event, boththe boss of the cell cover and the washer could be recessed. In otherwords, the arrangement shown in both Figs. 1 and 2 might be usedsimultaneously at each terminal post,-

By the present invention posts of the battery are packedwith grease,which prevents the creepage the posts, and thereforeprevents corrosionof the terminals which are attached to the posts, and the greasereceptacle around each post, includingthe coverof the receptacle, isformed in an inexpensive manner.

Having described my invention, 1 claim:

A storage battery comprising a container having .a boss with a terminalpost opening therein, a terminal post projecting through said openingand adapted to be surrounded w th corrosion preventing substanceadjacent said boss, and a cover for the boss and open- Preferably thecover 18 is the terminal of acid along ing shrunk onto the post to forma tight seal, whereby creepage of acid along the post 1s prevented. V

In testimony whereof, I hereunto afiix my signature. e

CARL J. DUNZWEILER.

